Expansion-bolt.



C. PAULI.

EXPANSION BOLT.

APPLICATION FILED 001'. 4, 1910.

1,019,723. Patented Mar. 5, 1912.

2 BHEBTS-SHEET 1.

WITNESSES i: i INVE/YTOR 4i $2M zg M 4 6. FLMZQ BY 7 3 @kg ATTORNEY C. PAULI.

EXPANSION BOLT.

APPLIOATION FILED 001'. 4, 1910.

1,01 9,723. Patented Mar. 5, 1912.

2 SHEETS-SHEBT 2.

WITNESSES INVENTOR 15. M M

A TTORNE Y UNITED STATES PATENT OFFICE.

CARL PAULI, 0F ROSELLE PAR-K, NEW JERSEY, ASSIGNOR T0 DIAMOND EXPANSION BOLT COMPANY, A CORPORATION OF NEW YORK.

EXPANSION -IBOL'1.

Specification of Letters Patent.

Patented Mar. 5, 1912.

To on whom it may concern:

Be it known that I, CARL PAULI, a citizen of the United States, and a resident of Roselle Park, in the county of Union and State of New Jersey, have invented certain new and'useful Improvements in Expansion- Bolts, of which the following isaspecification, taken in connection with the accompanying drawings, which form a part of the same.

This invention relates to expansion bolts and more particularly to a shield which can be used with an ordinary square or angular headed commercial bolt and nut, and to the combination of such shield with such a bolt.

In the accompanying drawings I have shown illustrative embodiments of my invention in which the same reference numerals refer to similar parts in the several figures.

Figure 1 is a side elevation of my expansion bolt, the support and the artlcle supported being shown in vertical section; Fig. 2 is a detail perspective View of one form of the expansion shleld; Fig. 3 is a pers ective view of an'ordinary square heade bolt; Fig. 4 is a lon itudinal vertical section through the shiel shown inFig. 2; Fig. 5 is an end elevation of the rear end of the shield looking into its interior; Fig. 6 is a vertical section through the shield taken through the recesses between the difl'erent forks or tines of the shield; Fig. 7 is a perspective view of the preferred formof ex pansion bolt, the support and the article supported being shown in vertical section; Fig.8 is a detail ers ective view of the preferred form. of s iel Fig. 9 is a vertical section through the shield shown in Fig. 8; and- Fig. 101s an elevation of the rear end of the shield shown in Fig. 8, looking into its bore or interior. I

In the illustrative embodiments of my invention shown in the drawing, 1 is one form of my expansion bolt comprlsing a shield 2 having a pluralit of arms, tines, or forks 3 wit interpose slots 4, 4 the arms extending out from preferably an integral ririg portion 5 of the shield.

ach end 6, '6 of the tines or forks 3, 3 is cut oil or beveled at 7, 7, two of these beveled portions on adjacent tines or forks forming a Y-shaped recess 8, the lower port1on of which merges into the slot 4 lyin between two tines or forks 3, 3. In use preferably employ four such tines, arms or forks 3, 3 which, as shown in Fig. 2, form four V-shaped slots 8, 8 for the reception of the square or angular head 9 of the bolt 10, Figs. 1 and 3, though this may be varied to correspond with the particular shape of angular head of the bolt and the nut.

In assembling my bolt anchor for shipment or use, it is merely necessary to ass the stem 11 of the bolt 10 through the ore 12 of the shield and secure the two members together by means of the nut 13; though, of course, it is to be understood that the shields and the bolts may be shipped and sold separately, if desired and assembled by the operator where they are to be used.

In my invention either the square head 9 of the bolt 10 may be used as the expanding means, the angular portions 14, 14 of the head of the bolt being received in the different V-shaped slots- 8, 8 lying between the different beveled portions 7, 7 of the time or forks 3, 3, or the nut may be used as the expanding means; its an ular portions being simllarly received in the V- sha ed slots. If the head 9 of the bolt 10 is, or example, used as the expanding member, Fig. 1, 1t will be held from rotation relatively to the shield 2 by its angular portions 14, 14 being received within the V- shaped slots 8, 8. By screwin up the nut 13, Fi 1, it is obvious that t e head 9 of the be t 10 will tend to travel down the bevel surfaces 7, 7 which will spread out the ends 6, 6 of the forks or tines 3, 3 and securely hold the expansion bolt 1 within the aperture 15 of the support 16 and in this manner secure the article su ported 17 to the support 16 which may be brick, masonry, metal or any other suitable su port.

To render the expansion of the ibrks or tines 3, 3 somewhat more sensitive, I, in some instances, thou h not necessaril cut away the arms 3, 3 firming a circumiere tial recess 18. I also in some instances, though not necessarily, form the end of the shield 2 with a flaring mouth 19 b beveling the interior surface of each one o the arms or tines 3, 3 so that in this form the ends of the tines will be beveled not only on their sides as at 7, 7, but also at 19 to cooperate with the head 9 of the bolt 10, or with the nut 13 if the latter should be used as the expanding means. My expansion bolt may be assembled and used by placing the'head"9 on the exterior of the article supported 17 as previously noted, the nut 13 being then located within the aperture 15'and cooperating with the end of the. shield and the V- shaped slots 8, 8 to expand its arms or tines,

.Fig. 7

In the preferred construction, Figs. 7 to 10, inclusive, I 'form a shield 20 with an integral ring portion 21 having a plurality of tines, arms or forks '22, four being shown, though it is to be understood that this number may be varied to correspond with difi'erent angular bolt heads 28 or angular nuts v27. Each of these arms or'tines 22 is preferably tapered from substantially the ring portion '21 to near its free end 32. Preferably, though not necessarily,I provide each of the ends 32, 32 with an enlarged portion in the form of a segment 23 which may form a shoulder 33 -"jwith the adjacent inclined or tapered portion of the arm or tine22.

Each segmentor. end of the arm or tine 22, if an enlarged segment is not used, is provided with one or two, preferably the latter, oppositely inclined bevel surfaces 24,

24 formlng V-shaped slots 25- which arei'n effect aflaring mouth to the slots 34, 3d

' lying between adjacent arms or tines 22, 22.

Within these V-shaped slots the angular portions 26 of the nut 27 Fig. 'Z'or'the angular portions 35 of the bolt head 28 are received as thecase may be, it being understood that inthis .form, as in the-other, either the nut or bolt head may-be the expanding means. I also preferably taper the interior surface of the segments 23, or the ends of the arms, if the enlarged segments are not'used, so as to form an inclined or flared mouth 36 to cooperate with the head of the bolt or nut.

In some cases I may also, but not necessarily, form a circular recess 37 in the shield 20 near the ring portion 21 to permit the arms or tines 22 to bend more freely. Either in conjunction with this recess 37 or's'eparately, I may in some instances enlarge the slots 34 forming enlarged openings 38 which also tend td permit the expanding means to more readily expand the tines or forks 22.

In using my improved expansion bolt, the

shield and bolt may be assembled and located in the support, the article to be supported 17 being) subse uently' adjusted on the stem of the. olt an secured by the nut, Fig. 1. Or when for the sake of appearances, or other reasons, it is desired to leave a neat, attractive and finished appearance tfi the exterior of the article supported 17, t e head of the bolt maybe located on the exterior of the article 17, the nut and screw threaded end of I the stem 29 of the bolt being concealed within the aperture 30 in the support 31, Fig. 7.

In bothforms of my invention one size of shieldmay be used with two or more sizes of bolts. It is well known that the nut of the ordinary square headed commercial,bolt,'with which my-shield is used, is somewhat larger than the head of the bolt. Therefore, a shield of a'given size, for example, one to cooperate with the head or nut of a 4 bolt, will also readily cooperate with a %"bolt by using the nut of this smaller bolt as the expander. Consequently with one sizeshield different sizes of commercial bolts may beused which will, for example, save the jobber carrying in stock a separate sized shield for each .size bolt;

and save the, mechanic from the labor-of physically carrying to the work shields for each size of bolts which he might have to use on any particular piece of work.

Having thus described this invention in connection with several illustrative embodiments thereof to the details of which I do not desire to be limited, What is claimed as new and what it is desired to secure by Letters Patent is set forth in. the appended claims:

1."A shield for an expansion bolt comof tapered arms or tines, each arm or tine being provided at its end with inclined surfaces on its edge forming substantially V-' shaped slots and near its other end with a bending recess.

2. The combina-tion of a shield having a series of longitudinal slots therein formlng a plurality of longitudinally extending fingers, and a bolt having a polygonal head,

and a polygonal nut, the sides of the head and of the nut being equal in number and also equal in .number to the number of fingers and the angles of the head and of the nut being adapted'to fit into the slots between the fingers of the shield for expanding the shield by the adjustment of the nut on the bolt.

3. The combination of a bolt provided with an angular head and an angular nut,

a shield for an expansion bolt com rising an integral ring portion, a plura ity of tapered arms or tines, enlarged segments.

95 prising an integral ring portion, a plurality 1 0n the end of each arm or tine, e'ach segment being provided on its edge with inclined surfaces forming substantially V- shaped slots, and further provided with an interior taper forming the shield with a flaring mouth, the angular head and angular nut both being removable and interchangeable to co6perate with the V-shaped slots and with the flaring mouth of the shield to expand it. 

